Strategies for Measuring Damage and Repair in Gene-Sized Specific DNA Sequences

  • Charles A. Smith
  • Philip C. Hanawalt

Abstract

Interest in how the efficiency of DNA repair might vary among specific categories of cellular DNA dates almost to the origin of the “repair replication” technique, which quantifies the short stretches of DNA synthesized during excision repair (Pettijohn and Hanawalt, 1964). It has always been clear that the biological consequences of DNA damage to the cell or organism would depend strongly on the functional role of the particular segment of DNA suffering the damage. Early studies were confined to comparing repair in classes of DNA that were in relative abundance and could be physically isolated for analysis such as chloroplast and mitochondrial DNA, and genomic satellite DNA. Later, the repair of the highly repetitive alpha DNA sequences in African green monkey cells was investigated in detail using a variety of techniques. This was made possible by the abundance of this alpha DNA species; 8% of the DNA can be easily isolated as pure 172-base-pair fragments by digestion by HindIII and gel electrophoresis (Zolan et al., 1982). These investigations (reviewed in Smith, 1987) demonstrated complex differences in the repair of this nontranscribed sequence as compared to the remaining, bulk DNA, and gave impetus to efforts to develop methods for studying repair in active genes.

Keywords

Repair Patch Cyclobutane Pyrimidine Dimer DHFR Gene Lesion Frequency Adenine Phosphoribosyltransferase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Charles A. Smith
    • 1
  • Philip C. Hanawalt
    • 1
  1. 1.Department of Biological SciencesStanford UniversityStanfordUSA

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